The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 27, 2015
Filed:
Mar. 14, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Katsuyuki Kobayashi, Yokohama, JP;
Hirokuni Takano, Yoshikawa, JP;
Yuichiro Yoshimura, Yokohama, JP;
Hajime Sato, Yokohama, JP;
Ritsuo Machii, Tokyo, JP;
Takuto Kawahara, Tokyo, JP;
Takayuki Hashimoto, Yokohama, JP;
Takayuki Komine, Kawasaki, JP;
Akihiro Matsushita, Tokyo, JP;
Naoki Umemura, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A coordinate input apparatus includes a first housing and a second housing each of which incorporate at least two sensor units each including one of the light projecting unit and one of the light receiving unit. A pointed position to an effective coordinate input region is calculated based on variations of a light amount distribution obtained from the light receiving units of each of the first and second housings. In each of the first and second housings, the field range of a light receiving unit is almost parallel to the effective coordinate input region, the optical axis direction of the light receiving unit is a direction perpendicular to a line segment connecting the barycenters of at least two sensor units in a single housing, and the field range is set to be asymmetric to the optical axis direction.